Charles s



PATENTED PEB.' 16, 1904,

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PPLIUATION FILED 00T. 22, 19.03.

E0 IODEL.

UNITED STATES Patented February 16, 1904.

PATENT FEICE.

CHARLES S. HISEY, OF DAYTON, KENTUCKY, ASSIGNOR TO THE HISEY- WOLFMACHINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION.

VARIABLE-SPEED MECHANIASNI.

SPECIFICATION forming part of Letters Patent No. 752,223, dated February16, 1904.

- Application filed October 22, 1903. Serial No; 17 8,105. (No model.)

To all whom it may concern,.-

Beit known that I, CHARLES S. HIsEY, a citizen of the United States,residing at Dayton, in the county of Campbell and State of Kentucky,have invented certain new and useful Improvements in Variable-SpeedMechanism, of which the following is a specication.

My invention relates to a variable-speed contrivance particularlyadapted to small or hand devices, such as portable hand-drills, electricdriven. In these devices the space available is very little and thedisposition of the main feed-shaft is so close to the spindle that anarrangement of gear-Wheels has to be devised particularly adapted tothis limited scope of disposition.

Thefeatures of my invention are more :fully set forth in the descriptionof the accompanying drawings, forming a part of the specification, inWhich- Figure 1 is a plan view of. my device attached. Fig. 2 is asection on line ma, Fig. 1. Figs. 3 and 4 are plan views of the gearing,illustrating the relative positions in the fast and slow speeds. Fig. 5is a detail sectional view on line w w, Fig. 1.

A represents the head of the easing inclosing the motor.

B represents the armature-shaft or main feed-shaft, on which is fixedthe driving-pinion 1.

C represents the drill-spindle shaft, to whichk it is desired to imparta fast and a slow speed from shaft B.

D represents a journal-stud mounted on the head A and carrying thegear-wheel 2, in mesh with pinion 1 on shaft B.

E F represent the'members of a compound tumbler-lever, which are pivotedtogether by the stud-pin e. One end of the member F has a journal-sleeveZ), journaled on the spinalle-shaft C.

c represents a stud-pin on theouter member E of the compoundtumbler-lever. G represents the' moving end of this compoundtumbler-lever, which is provided with a segmental .or cam slot d,through which projects the clampingscrew post H, which screw threadsinto the casing A and upon which post is A the ulcrum of the members EF, are the compound gear-wheels 5 6, gear-wheel 5 beinginintermesh withgear-Wheel 3 on the stud-pin c at all times.' The spindle-shaft C isprovided with the final driven gear-Wheel 7, constantly intermeshed withthe gear-wheel 6 on the stud-pin a. The end of the tumbler G has thefinger-clasp g for swinging the compound tumbler.

' Of course the casing-cap A is slotted at la and-r to admit of themovements of the studpins a and-c.Y Also the cap has orifices forpassing. the armature shaft and spindle.

If the nut H is released and the handle g grasped and swung to oneextremity of the slot CZ, the compound tumbler-lever E F Will fulcrum onthe spindle C and the member E will fulcrum on the. member F toswing thegear-wheel 4 in mesh with the gear-Wheel 2, and the transmission will bethrough the gearwheels 1 2 1- 3 5 6 7, in the order named. If the handleg be manipulated to bring the other extremity of the slot d intoengagement with the binding-post H, gear-wheel i will be disengaged fromgear-wheel 2, and gear-wheel 5 will be thrown into mesh with the drivinggear-'Wheel 1, the transmission being through gear-wheels'l, 5, 6,and/7, in the order named, and gear-wheels 2, 3, and 4 being disengagedobviously rotate as idlers.

It is evident that the walls of the slot CZ of the moving end G of thecompound tumblerlever have a cam action on the clamping-post H, whichcauses the outer end of the tumblerlever to move toward the gear-wheel 2and to cause the middle joint a of the compound tumbler-lever to moveaway from the driving gear-wheel 1. when the compound tumblerlever isswung in one direction.

compound tumbler-lever is swung in the other When the direction, theengagement of the post H and f compass and Without interfering withvtheclose disposition of the feed shaft and spindle necessary in such amotor-driven drill.

The movement of the compound tumblerlever required to make the twochanges is so slight and the movement so exact that the tumbler-levercan be readily shifted while the armature-shaft is in motion withoutdanger.

The arrangement of gearing thus described gives two changes of speed tothe driven shaft in the same direction.

rIhe invention is preferably applied to the armature-shaft; but I usethe term first and second shaft in the claims as involving a genericapplication of the principle.

The direction of transmission might be reversed without departure fromthe principle of the invention, and I do not, therefore, desire to belimited to the relative position of the driving and driven shafts. Alsovarious means might be employed to 'give the free end of the compoundlever a cam engagement or the equivalent thereof with the casing, so asto cause the middle-joint and the outer end of the tumbler-lever to movein opposite directions when the tumbler-lever is swung in eitherdirection on its main fulcrum. Also obviously any suitable lock may beemployed for fixing the tumbler-lever in position.

Having described my invention, I claim* 1. In an electric-driven drill,the casing, an armature feed-shaft and drill-spindle, supported inparallel position in the casing, a driving and a driven gear thereonrespectively, an intermediate gear-wheel journaled on the casing andintermeshed with the gear on the feed-shaft, a tumbler, gearing thereon,and means for swinging the tumbler in opposite directions whereby variedtrains of gears alternately engage the said driving and intermediategear-wheels, substantially as described. 2. In a drill, a feed-shaft andspindle in parallel planes, a driving and a driven gearwheel thereonrespectively, an intermediate gear-wheel journaled on the casing andintermeshed with the gear on the feed-shaft, a tumbler fulcrumed on oneof said shafts, a train of gear-wheels thereon, in mesh with thegear-wheel on the fulcrum-shaft of the tumbler, and means for shiftingsaid tumbler in opposite directions, whereby two different trains ofgear-wheels are alternately engaged between the feed-shaft and spindle,substantially as described.

3. In a drill, a casing, a feed-shaft and spindle disposed therein inparallelplanes, a

driving and a driven gear-wheel thereon re- Vfirst-named gear-wheel, atumbler fulcrumed on one of said shafts, a train of gear-wheels thereonin mesh with the gear-wheel on the fulcrum-shaft, and means for swingingsaid tumbler in opposite direction whereby different members of thegearing are alternately intermeshed with the gear-wheel on the other ofsaid shafts or with said intermediate gearwheel, substantially asdescribed.

4. In a drill, a casing, a rst and second shaft parallel therein,gear-wheels thereon, an intermediate gear-wheel journaled on the casingand intermeshed with the outside of saidgear-wheel on the rst shaft, atumbler-lever fulcrumed on the second shaft, gearing on the tumblerintermeshed with the gear on the second shaft, and means for swingingsaid tumbler in opposite directions whereby different members of thetumblergearing are alternately intermeshed with the intermediategearwheel or with said gear-wheel on the lirst shaft, substantially asdescribed.

5. In a drill, a casing, a rst and second shaft parallel therein,gearwheels on said shaft, an intermediate gear-wheel journaled on thecasing and in intermesh with the gearing on the first shaft, a compoundtumblerlever, one end of which is fulcrumed on the second shaft,compound gears on the middle joint and on the end of the tumbler-leverin train with one another and with the gear- Wheel on the second shaft,nand means for shifting said compound tumbler-lever whereby in onedirection of movement the compound gearing on the end of thetumbler-lever is intermeshed with the intermediate gear, and in theother direction of movement the compound gearing on the middle joint ofthe tumbler-lever is intermeshed with the gear on the first shaft,substantially as described.

6. Inadrill, acasing, airst and second shaft parallel therein,gear-wheels thereon, an intermediate gear-wheel journaled on the casingand intermeshed with the gear on the first shaft, a compoundtumbler-lever one end of which is fulcrumed on the secondV shaft,compound gears on the end of the tumbler-lever and on the middle jointthereof, in train with one another and the gear-wheel on the secondshaft, the swinging end of said tumbler compound lever being providedwith a cam-slot, and a clamping-post on the casing engaging through saidslot, whereby when the lever is moved to one extremity of the slot, thegearv ing on the end of the lever is moved toward the intermediategear-wheel, the gearing on the middle joint of the lever being movedfrom the gear-wheel on the first shaft, and when the lever is movedtothe other extremity of the slot the middle joint is moved toward thefirst shaft, and the end ofV the .tumbler-lever away III from theintermediate gear,substantially as described.

7. In a drill, a casing, afirst and second shaft parallel therein,gear-wheels thereon, an intermediate gear-wheel joui-nailed on thecasing and intermeshed with the gear on the first shaft, a compoundtumbler-lever one end of which is fulcrumed Aon the second shaft, themiddle joint and the outer end of said tumbler-lever having stud-pins,the head of the casing'having slots through which project the saidstud-pins, compound gears on said studpins in train with one another,and with the gear on the second shaft, the outer end of said leverhaving a cam engagement with the casing adapted to move the end of saidlever in opposite direction from the direction of movement of the middlejoint, when said lever is swung in either direction on its fulcrum,whereby the gear on the first shaft and its intermediate gear arealternately brought into train with different members of the gears onthe tumbler-lever, substantially as described.

8. ln adrill, a casing, a first and second shaft parallel therein, thecasing having a cap forming a seat for variable-speed mechanism, and

having orifices for the passage of said first and second shafts,gear-wheels on said shafts within the cap, an intermediate gear-wheeljournaled on the inside of the cap, intermeshed with the gear-wheel onthe rst shaft, a compound tumbler-lever one end of which is fulcrumed onthe second shaft, outside of the cap, the middle joint of the lever, andthe outer end having stud-pins internally projecting through slots inthe cap, compound gears on said stud-pins within the cap, in train withone another, and the gear-wheel on the second shaft, and means formanipulating the tumbler-lever to throw different members of thecompound gears into mesh with the intermediate gear and the gear on thefirst shaft, when said lever is swung in opposite directions,substantially as described.

9. In adrill, a casing, an armature-shaft and a spindle paralleltherein, a tumbler, and seven gear-wheels arranged on the casing, shaftsand tumbler adapted to be thrown into two trains as the tumbler is swungin opposite directions to give two changes of speed in the samedirection of rotation of the driven shaft, substantially as described.

10. In a drill, an armature-shaft and a spindle arranged close togetherin parallel planes, a gear-wheel arranged on each to pass each otherwithout engagement, an intermediate gear-wheel intermeshedwith one ofsaid gearwheels, a tumbler, a train of gearing thereon, meshing with oneof the first-named gearwheels and means for swinging said tumbler andconnecting said shafts and spindle in varied trains alternately,substantiallj7 as described.

h Inl testimony whereof I have hereunto set my CHARLES S. HISEY.

Witnesses:

OLIVER B. KAIsER, Luisa BECK.

